APA (7. basım) Alıntı

Não informado. Outdoor Recreation Research. U.S. Department of the Interior, Bureau of Outdoor Recreation.

Chicago Style (17. basım) Atıf

Não informado. Outdoor Recreation Research. Washington: U.S. Department of the Interior, Bureau of Outdoor Recreation.

MLA (8th ed.) Atıf

Não informado. Outdoor Recreation Research. U.S. Department of the Interior, Bureau of Outdoor Recreation.

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